Abiotic factors are the non-living things like temperature, soils conditions, water, etc. of a particular area that determine the kind of life surviving there. The article discusses these abiotic factors and how they affect living organisms. slide 1 of 8.
Also, it is rare, but if you are wearing socks for a long amount of time, and they start to itch, it may mean fuzzies from the socks are embedding in the creases in your feet, which cause the tiny pores in the creases of your feet to not be able to keep airing out.
There are a few conditions that can cause soft-tissue masses in the foot, including cysts, swollen tendons or tendon ruptures, nerve tumors (neurilemomas) or fat tumors. Foreign body reactions from previous penetrating trauma can also cause a mass in the bottom of the foot, as can an infection.